Garmin G500 Pilot's Manual page 160

During power-up of the GDU 620, the terrain/obstacle database versions are
displayed along with a disclaimer. At the same time, the Terrain system self-test
begins. A failure message is issued if the terrain test fails.
G500 Terrain
Configuration
Terrain Proximity
Terrain Proximity
w/ GNS/GTN
TAWS
Terrain Proximity
w/3rd-party TAWS
Terrain-SVT
Terrain-SVT w/
GNS/GTN TAWS
Terrain-SVT
w/3rd-party TAWS
* SVT Terrain/Obstacle shading is only available when SVT is enabled and
displayed.
** If the Garmin GPS/TAWS is not available, the G500 Terrain-SVT will
generate PFD annunciator text and aural callouts. An advisory message will
indicate when reversion to Terrain-SVT alerting has occurred.
GNS/GTN TAWS may be provided by a GNS 500WT-series or GTN-series
navigator with TAWS. The GNS/GTN TAWS must be interfaced to the G500 as
GPS 1.
In all configurations, any terrain information or alerts displayed on the MFD
are generated by the G500. Each of the terrain awareness configurations are
detailed in the following sub-sections.
4-2
PFD SVT Terrain/
Annunciator
Text
-
GNS/GTN TAWS
-
G500
GNS/GTN
TAWS**
-
Table 4-1 G500 Terrain Annunciations
Garmin G500 Pilot's Guide
Alert Source
MFD
Terrain/
Obstacle
Obstacle
Shading
Alerts
-
-
-
G500* G500
G500* G500
G500* G500
Aural
Callouts
- -
GNS/GTN
-
TAWS
3rd-party
-
TAWS
G500
GNS/GTN
TAWS**
3rd-party
TAWS
190-01102-02 Rev. E